package com.kuang.config;

import com.kuang.pojo.User;
import com.kuang.service.UserService;
import org.apache.shiro.SecurityUtils;
import org.apache.shiro.authc.*;
import org.apache.shiro.authz.AuthorizationInfo;
import org.apache.shiro.authz.SimpleAuthorizationInfo;
import org.apache.shiro.realm.AuthenticatingRealm;
import org.apache.shiro.realm.AuthorizingRealm;
import org.apache.shiro.session.Session;
import org.apache.shiro.subject.PrincipalCollection;
import org.apache.shiro.subject.Subject;
import org.springframework.beans.factory.annotation.Autowired;

public class UserRealm extends AuthorizingRealm {

    @Autowired
    UserService userService;
    //授权
    @Override
    protected AuthorizationInfo doGetAuthorizationInfo(PrincipalCollection principalCollection) {
        System.out.println("执行了授权doGetAuthorizationInfo");

        SimpleAuthorizationInfo info = new SimpleAuthorizationInfo();
//        info.addStringPermission("user:add");

        //拿到当前登录对象
        Subject subject = SecurityUtils.getSubject();
        User currentUser = (User)subject.getPrincipal();//取得user对象

        //设置当前用户权限
        info.addStringPermission(currentUser.getPerms());

        return info;
    }

    //认证
    @Override
    protected AuthenticationInfo doGetAuthenticationInfo(AuthenticationToken token) throws AuthenticationException {
        System.out.println("执行了认证doGetAuthorizationInfo");


        UsernamePasswordToken userToken = (UsernamePasswordToken) token;
        //连接真实数据库
        User user = userService.queryUserByName(userToken.getUsername());
        if (user==null){//没有该用户
            return null;
        }

        Subject currentSubject = SecurityUtils.getSubject();
        Session session = currentSubject.getSession();
        session.setAttribute("loginUser",user);

        //可以加密 MD5： MD5盐值加密
        // 密码认证，shiro做
        return new SimpleAuthenticationInfo(user,user.getPwd(),"");
    }
}
